topic /dev/dsk/chXtXdX? in Operating System - HP-UX

/dev/dsk/chXtXdX?

J. Les Bemont — Tue, 04 Apr 2006 16:11:57 GMT

My disk device files for disks on an Hitachi array are showing up as /dev/dsk/ch6t3d2. Anyone know why the 'h' is in there? Is it for Hitachi? :^)

Thanks.

--Les

Re: /dev/dsk/chXtXdX?

A. Clay Stephenson — Tue, 04 Apr 2006 16:21:42 GMT

Do an ls -l /dev/dsk, I want to see the major/minor device tuples.

Re: /dev/dsk/chXtXdX?

J. Les Bemont — Tue, 04 Apr 2006 16:43:33 GMT

brw-r----- 1 bin sys 31 0x063200 Nov 14 09:51 c6t3d2
brw-r----- 1 root sys 2 0x063210 Nov 19 00:34 ch6t3d2
brw-r----- 1 root sys 2 0x063110 Nov 19 00:34 ch6t3d1
brw-r----- 1 root sys 2 0x063010 Nov 19 00:34 ch6t3d0
brw-r----- 1 root sys 2 0x062710 Nov 19 00:34 ch6t2d7
brw-r----- 1 root sys 2 0x062610 Nov 19 00:34 ch6t2d6
brw-r----- 1 root sys 2 0x062510 Nov 19 00:34 ch6t2d5
brw-r----- 1 root sys 2 0x062410 Nov 19 00:34 ch6t2d4
brw-r----- 1 root sys 2 0x060410 Nov 19 00:34 ch6t0d4
brw-r----- 1 root sys 2 0x060610 Nov 19 00:34 ch6t0d6
brw-r----- 1 root sys 2 0x062010 Nov 19 00:34 ch6t2d0
brw-r----- 1 root sys 2 0x062210 Nov 19 00:34 ch6t2d2
brw-r----- 1 root sys 2 0x062310 Nov 19 00:34 ch6t2d3
brw-r----- 1 root sys 2 0x060510 Nov 19 00:34 ch6t0d5
brw-r----- 1 root sys 2 0x060310 Nov 19 00:34 ch6t0d3
brw-r----- 1 root sys 2 0x060210 Nov 19 00:34 ch6t0d2
brw-r----- 1 root sys 2 0x060110 Nov 19 00:34 ch6t0d1
brw-r----- 1 root sys 2 0x060010 Nov 19 00:34 ch6t0d0
brw-r----- 1 root sys 2 0x061710 Nov 19 00:34 ch6t1d7
brw-r----- 1 root sys 2 0x062110 Nov 19 00:34 ch6t2d1
brw-r----- 1 root sys 2 0x061610 Nov 19 00:34 ch6t1d6
brw-r----- 1 root sys 2 0x060710 Nov 19 00:34 ch6t0d7
brw-r----- 1 root sys 2 0x061010 Nov 19 00:34 ch6t1d0
brw-r----- 1 root sys 2 0x061210 Nov 19 00:34 ch6t1d2
brw-r----- 1 root sys 2 0x061110 Nov 19 00:34 ch6t1d1
brw-r----- 1 root sys 2 0x061310 Nov 19 00:34 ch6t1d3
brw-r----- 1 root sys 2 0x061410 Nov 19 00:34 ch6t1d4
brw-r----- 1 root sys 2 0x061510 Nov 19 00:34 ch6t1d5
brw-r----- 1 bin sys 31 0x020001 Dec 18 09:03 c2t0d0s1
brw-r----- 1 bin sys 31 0x021001 Dec 18 09:03 c2t1d0s1
brw-r----- 1 bin sys 31 0x063300 Apr 5 00:18 c6t3d3
brw-r----- 1 root sys 2 0x063310 Apr 5 00:19 ch6t3d3

Thanks!

--Les

Re: /dev/dsk/chXtXdX?

Patrick Wallek — Tue, 04 Apr 2006 16:51:06 GMT

Do you have any kind of special software for the Hitachi array installed? Maybe something similar to EMC PowerPath?

Re: /dev/dsk/chXtXdX?

A. Clay Stephenson — Tue, 04 Apr 2006 16:51:19 GMT

I've never used one of these arrays on an HP-UX box but the first thing I see is block major device 2 for these "ch" whereas "31" is typical. Do an lsdev and find out what device driver is associated with block major 2.

Re: /dev/dsk/chXtXdX?

Edgar_10 — Wed, 05 Apr 2006 01:59:28 GMT

Hi Les,

We have an HDS 9980 connected to an HP server environment and all the disk devices do not have the "h" in the device file name & block device number of 31.

Thanks in advance!

Re: /dev/dsk/chXtXdX?

sysadm_1 — Wed, 05 Apr 2006 02:57:53 GMT

Hi les,

Did you install any aditional driver for the disk array?
The major number of the hitachi disks are showing 2.Instead of 31.
check the driver drivers used.

sysadm